Work

Perspectives for utilization of green liquor dregs: Considerations for future studies

Year: 2026

Type: article

Abstract: The utilization of industrial residues is a growing area of global research interest, as environmental concerns, such as overconsumption of natural resources, have increased, and the adoption of circular economy models is becoming more popular. At least partly due to these developments, many different types of industrial waste have been successfully converted into resources, although vast amounts of waste still end up in landfills. This Timely Advances perspective article focuses on green liquor dregs (GLD), a residue from pulp mills, which has a low degree of utilization. GLD originates from the chemical recovery cycle of a kraft pulp mill and is mainly landfilled as waste. Its chemical and physical properties vary significantly, making it a difficult material for utilization. The key factors affecting the composition of GLD arises from the chemical recovery cycle and especially from the separation method of the dregs from the liquid. In this perspective letter, explanation of the formation and processing routes of GLD and their impacts on the properties of GLD will be given. Since these processes, including the separation method, have a clear impact on the composition, they also influence the utilization possibilities. This letter provides a focused summary of utilization considerations and suggestions for future research directions for academia and industry.

Source: Waste Management

DOI: 10.1016/j.wasman.2026.115573

Authors: Juho Rasmus, Teemu Kinnarinen, Juho Yliniemi

Institutions: University of Oulu, Lappeenranta-Lahti University of Technology

Language: English

Topic: Recycling and utilization of industrial and municipal waste in materials production

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $4,450